"""Tests for CLI serve/channel glue behavior."""

from __future__ import annotations

import os
import signal
from types import SimpleNamespace

from EvoScientist.cli import commands
from EvoScientist.config import MemoryObservationWriter
from EvoScientist.runtime import AsyncRuntime


def _make_config(
    *,
    default_workdir: str = "",
    channel_send_thinking: bool = True,
    log_level: str = "warning",
    channel_debug_tracing: bool = False,
    auto_approve: bool = False,
    auto_mode: bool = False,
    enable_ask_user: bool = True,
    dangerous_mode: bool = False,
):
    return SimpleNamespace(
        channel_enabled="telegram",
        default_workdir=default_workdir,
        channel_send_thinking=channel_send_thinking,
        log_level=log_level,
        channel_debug_tracing=channel_debug_tracing,
        auto_approve=auto_approve,
        auto_mode=auto_mode,
        enable_ask_user=enable_ask_user,
        dangerous_mode=dangerous_mode,
        enable_async_subagents=False,
        enable_scheduler=False,
        memory_profile_enabled=True,
        memory_observations_enabled=True,
        memory_observation_writer=MemoryObservationWriter.ALL,
        memory_workers_enabled=False,
        memory_skill_synthesis_enabled=False,
        model="test-model",
        provider="anthropic",
        anthropic_auth_mode="api_key",
        openai_auth_mode="api_key",
    )


def _run_serve_once(
    monkeypatch,
    config,
    *,
    workdir: str | None = None,
    no_thinking: bool = False,
    debug: bool = False,
    cwd: str | None = None,
    auto_approve: bool = False,
    auto_mode: bool = False,
    ask_user: bool = False,
    dangerous: bool = False,
    message_queue=None,
    process_message=None,
):
    import EvoScientist.config as config_mod

    order: list[tuple[str, str | None]] = []
    captured: dict[str, object] = {}

    def _fake_set_workspace_root(path):
        order.append(("set_workspace_root", str(path)))

    def _fake_ensure_dirs():
        order.append(("ensure_dirs", None))

    def _fake_load_agent(
        workspace_dir=None, checkpointer=None, config=None, *, runtime=None
    ):
        captured["workspace_dir"] = workspace_dir
        captured["async_runtime"] = runtime
        return object()

    def _fake_start_channels_bus_mode(cfg, agent, thread_id, *, send_thinking=None):
        captured["started"] = True
        captured["send_thinking"] = send_thinking
        captured["thread_id"] = thread_id

    def _fake_channels_stop(channel_type=None, *, runtime=None):
        captured["stopped"] = True

    class _InterruptQueue:
        """A fake queue whose get() immediately raises KeyboardInterrupt."""

        def get(self, timeout=None):
            raise KeyboardInterrupt()

    monkeypatch.setattr(commands, "set_workspace_root", _fake_set_workspace_root)
    monkeypatch.setattr(commands, "ensure_dirs", _fake_ensure_dirs)
    monkeypatch.setattr(commands, "_load_agent", _fake_load_agent)
    monkeypatch.setattr(
        commands, "_start_channels_bus_mode", _fake_start_channels_bus_mode
    )
    monkeypatch.setattr(commands, "_channels_stop", _fake_channels_stop)
    monkeypatch.setattr(
        commands,
        "_message_queue",
        message_queue if message_queue is not None else _InterruptQueue(),
    )
    if process_message is not None:
        monkeypatch.setattr(commands, "_serve_process_message", process_message)

    def _fake_get_effective_config(cli_overrides=None):
        captured["cli_overrides"] = dict(cli_overrides or {})
        merged = vars(config).copy()
        merged.update(cli_overrides or {})
        return SimpleNamespace(**merged)

    monkeypatch.setattr(config_mod, "get_effective_config", _fake_get_effective_config)
    monkeypatch.setattr(config_mod, "apply_config_to_env", lambda _cfg: None)

    if cwd is not None:
        monkeypatch.setattr(commands.os, "getcwd", lambda: cwd)

    with AsyncRuntime(thread_name="test-serve-runtime") as runtime:
        monkeypatch.setattr(commands, "_get_cli_async_runtime", lambda _ctx: runtime)
        commands.serve(
            object(),
            no_thinking=no_thinking,
            workdir=workdir,
            debug=debug,
            auto_approve=auto_approve,
            auto_mode=auto_mode,
            ask_user=ask_user,
            dangerous=dangerous,
        )
    return order, captured


def test_serve_workdir_has_highest_priority_and_sets_root_before_ensure(
    monkeypatch, tmp_path
):
    cfg_ws = tmp_path / "cfg_ws"
    cli_ws = tmp_path / "cli_ws"
    config = _make_config(default_workdir=str(cfg_ws), channel_send_thinking=True)

    order, captured = _run_serve_once(
        monkeypatch,
        config,
        workdir=str(cli_ws),
    )

    expected = str(cli_ws.resolve())
    assert captured["workspace_dir"] == expected
    assert any(step == ("set_workspace_root", expected) for step in order)
    set_idx = next(i for i, step in enumerate(order) if step[0] == "set_workspace_root")
    ensure_idx = next(i for i, step in enumerate(order) if step[0] == "ensure_dirs")
    assert set_idx < ensure_idx


def test_serve_uses_config_default_workdir_when_no_cli_workdir(monkeypatch, tmp_path):
    cfg_ws = tmp_path / "cfg_ws"
    config = _make_config(default_workdir=str(cfg_ws), channel_send_thinking=True)

    order, captured = _run_serve_once(monkeypatch, config)

    expected = str(cfg_ws.resolve())
    assert captured["workspace_dir"] == expected
    assert ("set_workspace_root", expected) in order


def test_serve_uses_cwd_when_no_workdir_config(monkeypatch, tmp_path):
    cwd = str(tmp_path.resolve())
    config = _make_config(default_workdir="", channel_send_thinking=True)

    order, captured = _run_serve_once(
        monkeypatch,
        config,
        cwd=cwd,
    )

    assert captured["workspace_dir"] == cwd
    assert ("set_workspace_root", cwd) in order


def test_serve_channel_thinking_respects_config_and_no_thinking(monkeypatch, tmp_path):
    ws = str((tmp_path / "ws").resolve())

    _, captured_default = _run_serve_once(
        monkeypatch,
        _make_config(default_workdir=ws, channel_send_thinking=True),
    )
    assert captured_default["send_thinking"] is True

    _, captured_cfg_off = _run_serve_once(
        monkeypatch,
        _make_config(default_workdir=ws, channel_send_thinking=False),
    )
    assert captured_cfg_off["send_thinking"] is False

    _, captured_cli_off = _run_serve_once(
        monkeypatch,
        _make_config(default_workdir=ws, channel_send_thinking=True),
        no_thinking=True,
    )
    assert captured_cli_off["send_thinking"] is False


def test_serve_debug_sets_log_level_and_channel_trace(monkeypatch, tmp_path):
    ws = str((tmp_path / "ws").resolve())
    config = _make_config(default_workdir=ws, channel_send_thinking=True)
    configure_calls: list[tuple[str | None, str | None]] = []
    monkeypatch.delenv("EVOSCIENTIST_LOG_LEVEL", raising=False)
    monkeypatch.delenv("EVOSCIENTIST_CHANNEL_DEBUG_TRACING", raising=False)

    monkeypatch.setattr(
        commands,
        "_configure_logging",
        lambda: configure_calls.append(
            (
                os.environ.get("EVOSCIENTIST_LOG_LEVEL"),
                os.environ.get("EVOSCIENTIST_CHANNEL_DEBUG_TRACING"),
            )
        ),
    )

    _, captured = _run_serve_once(
        monkeypatch,
        config,
        workdir=ws,
        debug=True,
    )

    assert captured["cli_overrides"] == {
        "log_level": "DEBUG",
        "channel_debug_tracing": True,
    }
    assert configure_calls == [("DEBUG", "true")]


def test_serve_auto_approve_only_sets_auto_approve(monkeypatch, tmp_path):
    ws = str((tmp_path / "ws").resolve())
    config = _make_config(default_workdir=ws, enable_ask_user=True)

    _, captured = _run_serve_once(
        monkeypatch,
        config,
        workdir=ws,
        auto_approve=True,
    )

    assert captured["cli_overrides"] == {"auto_approve": True}


def test_serve_auto_mode_implies_auto_approve_and_disables_ask_user(
    monkeypatch, tmp_path
):
    ws = str((tmp_path / "ws").resolve())
    config = _make_config(default_workdir=ws, enable_ask_user=True)

    _, captured = _run_serve_once(
        monkeypatch,
        config,
        workdir=ws,
        auto_mode=True,
        ask_user=True,
    )

    assert captured["cli_overrides"] == {
        "auto_mode": True,
        "auto_approve": True,
        "enable_ask_user": False,
    }


def test_serve_dangerous_sets_dangerous_mode(monkeypatch, tmp_path):
    ws = str((tmp_path / "ws").resolve())
    config = _make_config(default_workdir=ws)

    _, captured = _run_serve_once(
        monkeypatch,
        config,
        workdir=ws,
        dangerous=True,
    )

    assert captured["cli_overrides"] == {"dangerous_mode": True}


def test_serve_sigterm_cancels_active_message_scope_before_shutdown(
    monkeypatch, tmp_path
):
    handlers = {}
    message = commands.ChannelMessage(
        msg_id="message-1",
        content="run a long command",
        sender="user",
        channel_type="telegram",
        chat_id="chat-1",
    )

    class _OneMessageQueue:
        def get(self, timeout=None):
            return message

    def _fake_signal(signum, handler):
        previous = handlers.get(signum, signal.SIG_DFL)
        handlers[signum] = handler
        return previous

    cancelled_scopes = []

    def _fake_process_message(*args, **kwargs):
        handlers[signal.SIGTERM](signal.SIGTERM, None)

    monkeypatch.setattr(signal, "signal", _fake_signal)
    monkeypatch.setattr(
        "EvoScientist.stream.display.request_stream_cancel",
        cancelled_scopes.append,
    )

    _run_serve_once(
        monkeypatch,
        _make_config(default_workdir=str(tmp_path)),
        message_queue=_OneMessageQueue(),
        process_message=_fake_process_message,
    )

    assert cancelled_scopes == ["channel:telegram:chat-1:message-1"]


def test_serve_sigint_cancels_active_message_scope_before_interrupt(
    monkeypatch, tmp_path
):
    handlers = {}
    message = commands.ChannelMessage(
        msg_id="message-2",
        content="run a long command",
        sender="user",
        channel_type="telegram",
        chat_id="chat-2",
    )

    class _OneMessageQueue:
        def get(self, timeout=None):
            return message

    def _fake_signal(signum, handler):
        previous = handlers.get(signum, signal.SIG_DFL)
        handlers[signum] = handler
        return previous

    cancelled_scopes = []

    def _fake_process_message(*args, **kwargs):
        handlers[signal.SIGINT](signal.SIGINT, None)

    monkeypatch.setattr(signal, "signal", _fake_signal)
    monkeypatch.setattr(
        "EvoScientist.stream.display.request_stream_cancel",
        cancelled_scopes.append,
    )

    _run_serve_once(
        monkeypatch,
        _make_config(default_workdir=str(tmp_path)),
        message_queue=_OneMessageQueue(),
        process_message=_fake_process_message,
    )

    assert cancelled_scopes == ["channel:telegram:chat-2:message-2"]